Seabirds

Apart from wader birds which search for food on nearshore mud flats, there are several specialized seabirds on the open Northsea. They fly or swim arduous at sea and find their food diving or on the sea surface. Several of these bird species breed on cliffs of Haligoland or other bird cliffs around the Northsea.

http://www.schutzstation-wattenmeer.de/wissen/tiere/voegel/hochseevoegel